Ammeter

An ammeter is used to measure electrical current and
electricity can be produced by a generator.

Example

require'spec_helper'# Generators are not automatically loaded by Rails
require'generators/rspec/model/model_generator'describeRspec::Generators::ModelGenerator,:type=>:generatordo# Tell the generator where to put its output (what it thinks of as Rails.root)
destinationFile.expand_path("../../../../../tmp",__FILE__)beforedoprepare_destinationend# using mocks to ensure proper methods are called
# invoke_all - will call all the tasks in the generator
it'should run all tasks in the generator'dogen=generator%w(posts)gen.should_receive:create_model_specgen.should_receive:create_fixture_filecapture(:stdout){gen.invoke_all}end# invoke_task - will call just the named task in the generator
it'should run a specific tasks in the generator'dogen=generator%w(posts)gen.should_receive:create_model_specgen.should_not_receive:create_fixture_filecapture(:stdout){gen.invoke_task:create_model_spec}end# custom matchers make it easy to verify what the generator creates
describe'the generated files'dobeforedorun_generator%w(posts)enddescribe'the spec'do# file - gives you the absolute path where the generator will create the file
subject{file('spec/models/posts_spec.rb')}# is_expected_to exist - verifies the file exists
it{is_expected_toexist}# is_expected_to contain - verifies the file's contents
it{is_expected_tocontain/require 'spec_helper'/}it{is_expected_tocontain/describe Posts/}enddescribe'the migration'dosubject{migration_file('db/migrate/create_posts.rb')}# is_expected_to be_a_migration - verifies the file exists with a migration timestamp as part of the filename
it{is_expected_toexist}it{is_expected_tocontain/create_table/}endendend

Available matchers

exist - verifies the file exists

contain - verifies the file's contents

be_a_migration - verifies the file exists with a migration timestamp as part of the filename

have_correct_syntax - verifies the file has correct syntax and is not broken (works for .rb, .erb and .haml files)

Contributing

Check out the latest master to make sure the feature hasn’t been implemented or the bug hasn’t been fixed yet

Check out the issue tracker to make sure someone already hasn’t requested it and/or contributed it

Fork the project

Start a feature/bugfix branch

Commit and push until you are happy with your contribution

Make sure to add tests for it. This is important so I don’t break it in a future version unintentionally.

Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.